AS3608 EVAL BOARD ams

austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com Data Sheet AS3608 System PMU with HV Back Light Driver HV Backlight Driver 1 General Description Step up for 30V backlight with internal transistor The AS3608 is an ultra compact System PMU with integrated battery Voltage control mode and over-voltage protection charger and HV back light driver. 2 programmable current sink (max. 38mA) The device offers advanced power management functions. All necessary ICs and peripherals in a battery powered mobile device Max. 20mA 50V (with ext. transistor) or 500mA 5V are supplied by the AS3608. It features 3 DCDC converters as well Possible external PWM dimming input as 5 low noise LDOs. The different regulated supply voltages are programmable via the serial control interface. Battery Charger Prog. trickle charging (25-265mA) The step-up converter for the backlight can operate up to 30V. Both constant voltage (OLED supply) as well as constant current (white Prog. constant current charging (94-1060mA) LED backlight) operations with 2 current sinks are possible. An Prog. constant voltage charging (3.9V-4.25V) internal voltage protection is limiting the output voltage in the case of external component failures. Charger time-out and temperature supervision AS3608 also contains a Li-Ion battery charger with constant current Selectable current limitation for USB mode and constant voltage. The maximum charging current is 1A. An Integrated battery switch & ideal diode integrated battery switch and an optional external switch are separating the battery during charging or whenever an external External battery switch control output power supply is present. With this switch it is also possible to operate with no or deeply discharged batteries. A programmable current limit General can be used to control the maximum current used from a USB Battery and Temperature Supervisor supply. The single supply voltage may vary from 2.7V to 5.5V. 4 General Purpose IOs 10bit general purpose ADC input PWM dimming input or wake-up input 2 Key Features Status output for: charger, low battery, power good and power- up key Power Management OTP Programmable BOOT Sequence Voltage Generation Programmable regulator default voltages 3 DCDC step down regulators Programmable start-up sequence - DVM (0.61V-3.3V, 1A 1.2V, 900mA 1.8V 800mA 2.5V) Applicable for LDO 1-4 and DCDC 1-3 - 50A quiescent current Control Interface - Selectable switching frequency (2 or 1MHz) I2C control lines, including watchdog - 2A 1.2V with combined DCDC 2 & 3 1 LDO low noise 2.7V (2.3-3.5V), 100mA Power-Up input 3 or 4 LDOs low noise Interrupt output Bidirectional reset, with selectable delay - 1.2-3.5V 160/270mA - 30A quiescent current (low power mode) Low power standby mode, 180A with LDO5 on Power supply supervision (LDO5) Power-On Reset Circuit 4sec and 8sec emergency shut-down Packaging Hibernation function QFN36 6x6mm, 0.5mm pitch 3 Application The devices are ideal for Portable Media Players and Portable Navigation Devices, e-Books, Tablet PCs, etc www.austriamicrosystems.com Revision 1.03 1 - 67 ams AG Technical content still valid